.Gradient{&:before{content:"";position:absolute;top:0;left:0;right:0;height:100vh;background:radial-gradient(ellipse at top left,var(--gradient-left) 10%,transparent 60%),radial-gradient(ellipse at top right,var(--gradient-right) 10%,transparent 60%);z-index:-1;transition:background .3s}}